1#ifndef _ASM_X86_HWEIGHT_H
 2#define _ASM_X86_HWEIGHT_H
 3
 4#include <asm/cpufeatures.h>
 5
 6#ifdef CONFIG_64BIT
 7/* popcnt %edi, %eax */
 8#define POPCNT32 ".byte 0xf3,0x0f,0xb8,0xc7"
 9/* popcnt %rdi, %rax */
10#define POPCNT64 ".byte 0xf3,0x48,0x0f,0xb8,0xc7"
11#define REG_IN "D"
12#define REG_OUT "a"
13#else
14/* popcnt %eax, %eax */
15#define POPCNT32 ".byte 0xf3,0x0f,0xb8,0xc0"
16#define REG_IN "a"
17#define REG_OUT "a"
18#endif
19
20#define __HAVE_ARCH_SW_HWEIGHT
21
22static __always_inline unsigned int __arch_hweight32(unsigned int w)
23{
24	unsigned int res;
25
26	asm (ALTERNATIVE("call __sw_hweight32", POPCNT32, X86_FEATURE_POPCNT)
27			 : "="REG_OUT (res)
28			 : REG_IN (w));
29
30	return res;
31}
32
33static inline unsigned int __arch_hweight16(unsigned int w)
34{
35	return __arch_hweight32(w & 0xffff);
36}
37
38static inline unsigned int __arch_hweight8(unsigned int w)
39{
40	return __arch_hweight32(w & 0xff);
41}
42
43#ifdef CONFIG_X86_32
44static inline unsigned long __arch_hweight64(__u64 w)
45{
46	return  __arch_hweight32((u32)w) +
47		__arch_hweight32((u32)(w >> 32));
48}
49#else
50static __always_inline unsigned long __arch_hweight64(__u64 w)
51{
52	unsigned long res;
53
54	asm (ALTERNATIVE("call __sw_hweight64", POPCNT64, X86_FEATURE_POPCNT)
55			 : "="REG_OUT (res)
56			 : REG_IN (w));
57
58	return res;
59}
60#endif /* CONFIG_X86_32 */
61
62#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_X86_HWEIGHT_H
 3#define _ASM_X86_HWEIGHT_H
 4
 5#include <asm/cpufeatures.h>
 6
 7#ifdef CONFIG_64BIT
 
 
 
 
 8#define REG_IN "D"
 9#define REG_OUT "a"
10#else
 
 
11#define REG_IN "a"
12#define REG_OUT "a"
13#endif
14
 
 
15static __always_inline unsigned int __arch_hweight32(unsigned int w)
16{
17	unsigned int res;
18
19	asm (ALTERNATIVE("call __sw_hweight32", "popcntl %1, %0", X86_FEATURE_POPCNT)
20			 : "="REG_OUT (res)
21			 : REG_IN (w));
22
23	return res;
24}
25
26static inline unsigned int __arch_hweight16(unsigned int w)
27{
28	return __arch_hweight32(w & 0xffff);
29}
30
31static inline unsigned int __arch_hweight8(unsigned int w)
32{
33	return __arch_hweight32(w & 0xff);
34}
35
36#ifdef CONFIG_X86_32
37static inline unsigned long __arch_hweight64(__u64 w)
38{
39	return  __arch_hweight32((u32)w) +
40		__arch_hweight32((u32)(w >> 32));
41}
42#else
43static __always_inline unsigned long __arch_hweight64(__u64 w)
44{
45	unsigned long res;
46
47	asm (ALTERNATIVE("call __sw_hweight64", "popcntq %1, %0", X86_FEATURE_POPCNT)
48			 : "="REG_OUT (res)
49			 : REG_IN (w));
50
51	return res;
52}
53#endif /* CONFIG_X86_32 */
54
55#endif